[44483] in North American Network Operators' Group
RE: Followup British Telecom outage reason
daemon@ATHENA.MIT.EDU (Youse, Chuck)
Thu Nov 29 03:24:23 2001
Message-ID: <E3749AFB8849D5119E3000508B637399B96D59@shamsgpnt01.gtsgroup.com>
From: "Youse, Chuck" <Chuck.Youse@ebone.com>
To: 'Patrick Greenwell ' <patrick@cybernothing.org>,
'Christian Kuhtz ' <christian@kuhtz.com>
Cc: 'Alex Bligh ' <alex@alex.org.uk>, 'Paul Vixie ' <vixie@vix.com>,
"'nanog@merit.edu '" <nanog@merit.edu>
Date: Thu, 29 Nov 2001 09:20:59 +0100
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Errors-To: owner-nanog-outgoing@merit.edu
You'll forgive me for being cynical here, but I seriously doubt that any
Linux-derived operating systems could truly qualify as 'real-time'. To meet
the requirements for an RTOS, Linux would have to be so heavily mutated that
it would no longer be Linux.
Cheers
Chuck
-----Original Message-----
From: Patrick Greenwell
To: Christian Kuhtz
Cc: Alex Bligh; Paul Vixie; nanog@merit.edu
Sent: 29/11/01 07:49
Subject: RE: Followup British Telecom outage reason
On Wed, 28 Nov 2001, Christian Kuhtz wrote:
>
> > I guess some time someone will realize routers are both
> > hardware, and software, and shock horror both, if done
> > well, can actually add value. [hint & example: compare the
> > scheduler on, say, Linux/FreeBSD, Windows 95 (sic),
> > and your favourite router OS (*); pay particular attention
> > to suitability for running realtime, or near realtime tasks,
> > where such tasks may occasionally crash or overrun their
> > expected timeslice; note how the best OS amongst the
> > bunch for this aint exactly great].
> >
> > (*) results may vary according to personal choice here.
>
> Don't use a non-realtime OS for something that you expect realtime or
> near-realtime OS functionality. There are specific systems to address
these
> kinds of needs with rather complicated scheduling mechanism to
accomodate
> such requirements in a sensible manner.
>
> Is IOS a realtime operating system? No. Are any of the other listed
OS
> realtime operating systems? No.
Actually there are multiple Linux-based RTOSes.
